Horizontal combination boiler



Nov. 7, 1933 F. P. ANDERSON HORIZONTAL COMBINATION BOILER Filed June 10, 1931 2 Sheets-Sheet l FOLSOM F ANDERSON Nov. 7, 1933.

F. P. ANDERSON HORI ZONTAL COMBINATION BOILER Filed June 10, 1931 2 Sheets-Sheet' 2 FOL 50/? P ANQE/asm/ Patented Nov. 7, 1933 UNITED STATES 1,933,695 HORIZONTAL COMBINATION BOILER Folsom Page Anderson, Detroit, Mich. Application June 10, 1931. Serial No. 543,411

Claims. (o1. 122-195) This invention relates to horizontal combination boilers and the object of the invention is to provide a boiler having water tubes connected therewith and provided with a setting in which the hot gases are caused to take a circuitous path between the water tubes and thence back through the boiler before being discharged to the stack. Another object of the invention is to provide a steam boiler in which the flue is placed at'the front of the boiler setting so that the-hotgases in passing through the water tubes and boiler gives up the maximum amount of heat before passing to the stack.

Another object of the invention is to provide a deflector wall which is adapted to deflect the heat up between the water tubes and against the boiler from which it passes downwardly beneath a second partition andthrough the water tubes and thence upwardly and forwardly through the.

boiler from whence it is discharged to' the stack at the front of the boiler setting at a relatively low temperature.

Another object of the invention is to provide a boiler whose horse-power may be increased by adding water tubes thereto or decreased by removing water tubes.

. Another object of the invention is to provide a construction in which the interior of the water tubes is readily accessible for cleaning.

These objects and the several novel features of the invention are hereinafter more fully described and claimed and the preferred form of construction by which these objects are attained is shown in the accompanying drawings in which-- Fig. 1 is a longitudinal section through a horizontal combination boiler embodying my invention.

Fig. 2 is a section taken on line A--A of Fig. 1.

Fig. 3 is a section taken on line B-B of Fig. 1.

Fig. 4 is a longitudinal section through a similar boiler of larger horse-power.

Fig. 5 is a transverse section therethrough.

Fig. 6 is a section through the air pipe.

The boiler is provided with a front plate 1 having the usual fire door 2 and ash pit door 3, shown in Fig. 1. A wall 4 is built up to provide a setting for the front end of the boiler and a deflector wall 5 is built up and provides asupport for the grates 6 on which the fire is built. Near the rear end and spaced from the bottom of the boiler setting is a heavy pipe '7 which is open to atmosphere at both ends through the side walls of the boiler setting and is provided with apertures 36 through the side toward the rear of the boiler setting as shown in Fig. 6 and a second de fiector wall or partition 8 is provided directly above the pipe '7 as shown in Fig. 1. The boiler is of the usual type of horizontal tubular boiler comprising a cylindrical casing 9 having a series of flue tubes 10 extending horizontally therethrough, as shown in Fig. 2, and provided with a clean-out plate 11, as shown. At the front end the boiler is provided with a water leg. 12 shown in Figs. 1 and 2 and the water tubes 13 are connected at one'end to this water leg and at the lower end open into a clean-out drum 14, as

shown.

Opposite the ends of the tubes 13 secured in the water leg is a series of clean-out plugs 15 which may be removed to allow access to the interior of the water leg 12 for replacement of the tubes or for cleaning out the tubes. Extending from the drum 14 is a series of water tubes 16 which extend upwardly and are connected into the interior of a clean-out drum 17 which is connected directly to the rear water leg 18, as shown in Figs. 1 and 3. r

' When the boiler is in use the heated gases and flame passmg upwardly from the fire heats the tubes 13 and the outer surface of the boiler 9 and in this first movement it will be noted that the gases are directed againstxthe surface of the cylindrical boiler shell due to the deflecting partition wall 5. In this connection it will be noted that part of the heat of the flame is absorbed by the tubes 13 so that a flame of less intensity impinges against the lower surfaces of the boiler thus increasing the life of the boiler and reducing the danger of burning out the boiler wall. The gases then pass downwardly over the partition wall 5 in the direction of the arrows toward the bottom of the boiler setting and beneath the partition wall 8 and during this movement the gases heat the water tubes 16 and tend to follow the contour of the said water tubes when passing beneath the partition 8, as indicated by the arrows shown in Fig. 1. As the gases pass the pipe 7 at the lower edge of the partition wall 8, air is drawn through the pipe 7, which is open to atmosphere at both ends and through the openings 36 in the back side of the pipe to add oxygen to the gases oi' combustion at this point and increases combustion.

As these gases pass upwardly they pass through the horizontal flue tubes 10 of the boiler and are finally discharged from the front end of the boiler into the stack 19 at a comparatively low vtemperature as practically all of the effective heat from the combustion gases has been absorbed by the time the gases reach the flue 19, which in turn gives CO2 combustion.

In Figs. 4 and 5, I have illustrated an alternative form of the boiler built on the same principle as that shown in Figs. 1, 2 and 3 but designed to increase the horse-power of the boiler. In this construction the Walls 20 and 21 of the boiler setting are considerably higher than in the form shown in Figs. 1, 2 and 3 and the boiler 22 is supported on the drums 23, 24 and 25 to which the water legs 26, 27 and 28 are connected. These clean-out drums extend between the walls 20 and 21 and are firmly supported therein. A large clean-out drum 29 is provided at the bottom of the boiler setting as shown'in Figs 4 and 5 and a series of water tubes 30 connect the drum 29 with the drum 23. A series of water tubes 31 connect the drum 29 with the drum 24 and a series of water tubes 32 connect the drum 29 with the drum 25. In this form of boiler setting, grates 33 are provided on which the fire is built and an inclined baille 34 is provided which takes the place of the partition wall 5 and acts as a deflector for the flame and hot gases. A second partition wall 35 is provided which is similar to the partition wall 8 shown in Fig. 1 and a pipe 7 is provided at the lower edge of this partition wallas shown in Fig. 6 which is provided with openings 36 on one side as shown. 4

In all other respects this form of boiler is the same as that shown in Figs. 1, 2 and '3 and as indicated by the arrows shown in Fig. 4 the flame and hot gases pass upwardly about and between the water tubes 30 and are deflected upwardly toward the boiler 22 from which the hot gases are directed downwardly along the partition 35 and through the water tubes 31 thence beneath the partition 35 and pipe 7 which adds fresh air to the gases to increase combustion and from this point the gases flow upwardly between the water tubes 32 andthence through the boiler flue. tubes and out through the flue 19. In this form an additional series of water tubes and an additional water leg is provided at thecenter of the boiler along the partition 35 and the addi tional number of tubes with their increased length greatly increases the horse-power of the boiler. By means of the deflecting partitions 34 and 35 the gases are caused to take a circuitous path between the different water tubes resulting in a much greater efficiency for the boiler.

In either form of the device, the hottest gases strike the tubes 13 or 30 as the case may be which produces flow of steam upwardly through the tubes into the forward end of the boiler and as this flow is replaced by additional water from the rear water leg, the circulation of water is in the opposite direction to the flow of gases through the boiler and produces increased circulation over the usual horizontal return tube boiler.

From the foregoing description, it becomes evident that the device is very simple and eflicien't in operation, will produce a flow of gases of twice the length of the boiler setting, will absorb practically all of the effective heat of the gases before passing to the flue and provides a device which accomplishes the objects described.

Having thus fully describedmy invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is 1. In a horizontal combination boiler, a boiler setting, a series of three clean-out drums supported in the boiler setting, a boiler provided with a series of water legs connected to the clean-out drums and suported thereon, a clean-out drum adjacent the bottom of the boiler setting and supported therein, a series of water tubes connecting the lower clean-out drum with the other cleanout drums, a battle directing the flow of gases upwardly through the first series of water tubes 2. second baffle directing the flow of hot gases downwardly through the second series of water tubes and upwardly through the third series of water tubes, a pipe at the lower edge of the second battle and open to atmosphere through the walls of the boiler setting, the said pipe being provided with a series of apertures beneath the bafile wall adapted to allow air to flow therethrough and mix with the hot gases during passage of the gases thereby, the boiler being provided with horizontal flue tubes and the hot gases being adapted to pass from the third series of water .tubes through the said flue tubes of the boiler and a discharge flue at the forward end of the boiler setting into which the gases from the boiler fines are adapted to .discharge.

2. In a horizontal combination boiler, a boiler setting, a series of three clean-out drums supported in the boiler setting, a boiler provided with a series of water legs connected to the'clean-out drums and supported thereon, a celan-out drum adjacent the bottomof the boiler setting and supported therein, a series of water tubes connecting the lower clean-out drum with the other clean-out drums, a baffle directing the flow of gases. upwardly through the first series of tubes, a second baiile directing the flow of hot gases downwardly through the second series of tubes and upwardly throughthe third series of tubes, the boiler being provided with flue tubes and the hot gases being adapted to pass from the third series of water tubes through the said flue tubes of the boiler and a discharge 'flue at the forward end of theboiler setting into which the combustion gases from the boiler flues are adapted to discharge.

3. In horizontal combination boiler, a boiler setting, a return tube boiler mounted in the setting, a clean-out drum adjacent the bottom of the boiler setting and suported therein,a series of water tubes connecting the clean-out drum with the opposite ends of the boiler, a baflle wall extending upwardly from thebottom of the boiler setting and directing the flow of hot gases upwardly through the first series of water tubes, a

second baiile wall extending downwardly from the return tube boiler and directing flow of hot gases downwardly through the second series of water tubes, a conduit at the lower edge of the second baflleand open to atmosphere through the walls of the boiler setting, the said conduit being provided with a series of apertures beneath the baili'e wall adapted to allow air to flow therethrough and mix with'the hot gases during passage of the hot gases thereby,-the device being arranged to direct the flow of hot gases from the second series of water tubes through the flue tubes of the boiler and a discharge flue at the forward end of the return tube boiler through which the hot gases are discharged.

4. In a horizontal combination boiler, a boiler setting, a return tube boiler mounted in the setting, a clean-out drum adjacent the bottom of the boiler setting and suported therein, a series of Water tubes connecting the clean-out drum with edge of series of water tubes and upwardly through the flue tubes of the boiler, aeonduit at the lower the second bafile open to atmosphere through the walls of theboiler setting, the said conduit being apertured and adapted to allow air to flow therethrough and mix with the hot gases during passage of the hot gases thereby, and a discharge flue at the forward end of the boiler setting into which the combustion gases from the boiler tubes are adapted to discharge.

5. In a horizontal combination boiler, a boiler setting, a return tube boiler mounted in the setting, a clean-out drum adjacent the bottom of the boiler setting, a series of water tubes connecting the clean-out drum with the opposite ends of the boiler, a baffle directin'gthe flow of gases upwardly through the first series of'tubes, a sec ond baffie directing the flow of hot gases downwardly through the second series of water tubes,

means for adding, atmospheric air to the hot gases at the bottom of the second bafiie, the gases passing through the second series of water tubes being directed upwardly through the flue tubes of the boiler and a discharge flue at the forward end of the boiler setting into which the combustion gases from the boiler tubes'are adapted to discharge. 7

' FOLSOM PAGE ANDERSON. 

